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Actual speed obtained at any value of armature current comparing to speed obtained by assuming linear magnetic assumption in DC series motor is _______

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Actual speed obtained at any value of armature current comparing to speed obtained by assuming linear magnetic assumption in DC series motor is _______

(a) Same

(b) Higher

(c) Lower

(d) Cannot say

I have been asked this question in final exam.

My question is based upon Operating Characteristics of DC Series Motor topic in section Characteristics of DC Motors of DC Machines

1 Answer

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Best answer
Correct choice is (b) Higher

The explanation is: From speed current characteristics of a DC series motor is easily seen that, initial value of speeds in both of the cases is same or rather infinite, but as a armature current or load current increases speed starts dropping down relatively more in the case of linear magnetization.

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